Cement Treated Base (CTB) is a general term that applies to an intimate mixture or native soils and/or manufactured aggregates...
Cement Treated Base / Soil Cement:
Cement Treated Base / Soil Cement: - Cement Treated Base (CTB) is a general term that applies to an intimate mixture or native soils and/or
manufactured aggregates with Portland Cement Concrete and water. Other descriptions such as soil-
cement, cement-treated aggregate base, cement-stabilized roadbed, and cement stabilized base are
CTB has several COST SAVINGS advantages over conventional bases. First, CTB
provides a stiffer and stronger based than conventional base materials, which results in lower strains
in the pavement surface. This both delays the onset of common surface distresses, including fatigue
induced cracks, and prolongs the life of the pavement system. In addition, due to the higher loading
capacity, the thickness of CTB layers can often be reduced in comparison to conventional bases while
still carrying the same traffic. Finally, the use of local soils or in-place materials is often possible with CTB,
which can significantly reduce material hauls.
From a construction standpoint, of the biggest advantages
of CTB is the ability to maintain a working platform following periods of inclement weather. AG Peltz
Group experienced this firsthand while working at the Honda Plant. In the early job phases construction
delays were common as the existing dense grade base would become saturated and unworkable for days
at a time.
Honda personnel approached A.G. Peltz about co-developing a solution that would be both cost
effective and allow construction targets to be maintained. This solution was 4" of CTB. AG Peltz mixed
and placed the materials with the same equipment and process as conventional RCC. It took no time at
all to discover that once the cement hydration process was underway and materials interlocked– the CTB
layer was virtually impenetrable to water. AG Peltz was able to place RCC within 24 hours of excessive
rainfall. Cost competitiveness also was maintained as the base layer was reduced from 6" of aggregate
base to 4" of CTB. The end result is that Honda now uses 4" of CTB under all paving areas.
has continued to grow its presence in placing CTB since the initial Honda project. They have completed
projects with strict testing requirements, including high strength mixes for the Pensacola Airport (FAA
Specifications) and lower strength mixes for the Alabama Department of Transportation (Soil-Cement). In
each case, the use of local materials mixed with cement and water was more economical than hauling in
select granular materials. Economy, quality, innovation – the AG Peltz way.